Ricoh Company, Ltd.

Ricoh Technology, Ltd.

Akinori Saitoh

Masahide Yamada

Masahiro Ohki

Naohiro Watanabe

Ryota Inoue

Shigeru Emoto

Junichi Awamura

Tsunemi Sugiyama

Chiaki Tanaka

Hiroshi Yamada

Osamu Uchinokura

Sonoh Matsuoka

Tomomi Suzuki

Shinichi Wakamatsu

Yohichiroh Watanabe

Shinya Nakayama

Tsuyoshi Sugimoto

Akio Takei

Shinsuke Nagai

Toma Takebayashi

Akihiro Takeyama

Naohito Shimota

Hideyuki Santo

Suzuka Amemori

Takeshi Takada

Eiji Sawamura

Takayuki Yoshii

Yasuo Kamada

Koh Ohnuma

Hiroyuki Takeda

Hiroshi Yamashita

Takuya Seshita

Shin Hasegawa

Minoru Masuda

Toyoshi Sawada

Hitoshi Iwatsuki

Shinichiro Yagi

Toshiki Nanya

Masashi Nagayama

Tomio Kondou

Kohsuke Nagata

Kazuyuki Hirai

Ryohta Inoue

Kazushige Yasumatsu

Masahiro Yukikawa

Ryuta Chiba

Suzuka Karato

Takahiro Kadota

Ryuuta Yoshida

Tomomi Harashima

Hideyuki Santoh

Kazushige Sanyo Chemical Ind Ltd Yasumatsu

Kazuyuki Sanyo Chemical Industries Ltd Hirai

A toner includes toner base particles and external additives deposited on a surface of the toner base particle. The toner base particle includes an amorphous polyester resin, a crystalline polyester resin, a release agent, and resin particles. An abundance ratio of the crystalline polyester resin in the surface of the toner base particle as observed by TEM is 2.5% or greater but 25% or less. The resin particles are deposited at the surface of the toner base particle as observed by SEM. A ratio of aggregates of the resin particles occupying the surface of the toner base particle is 1% or greater but 70% or less, where R is a major axis of the minimum particle of the resin particles, and the resin particle having a major axis of 3R or greater is determined as the aggregate.

Toner, developer, toner storage unit, image forming apparatus, and image forming method

A toner includes toner particles, each including: a toner base particle including a binder resin, a colorant, and wax; and resin particles on a surface of the toner base particle, wherein Formulae 1 to 3 below are satisfied, where M is a volume average primary particle diameter (nm) of the resin particles, and L is a distance (nm) between the resin particles present next to one another on the surface of the toner base particle:  (Formula 1)5 (nm)<≤60 (nm); and  (Formula 2)0.40≤[(nm)/(nm)]<0.90.  (Formula 3)

Toner and production method thereof, and toner stored unit, image forming apparatus, and image forming method

A toner includes toner base particles each including: a binder resin, a colorant, and wax; and resin particles on surfaces of the toner base particles. A standard deviation of a distance between the resin particles next to each other on the surfaces of the toner base particles is less than 500 nm.

Toner and production method thereof, toner stored unit, image forming apparatus, and image forming method

A toner is provided. The toner includes an amorphous resin, a crystalline resin dispersed in the amorphous resin, and a release agent. The toner satisfies the following inequality:&#x3c;0.8where A represents a perimeter of the crystalline resin and B represents a length of a part of the perimeter A of the crystalline resin at which the crystalline resin is in contact with the amorphous resin, A and B being measured from a cross-sectional image of the toner observed with transmission electron microscope.

Toner, toner storage unit, image forming apparatus, and method for manufacturing toner

Toner that includes a polyester resin, fluorine and aluminum. The toner satisfies formulae (1) and (2),1.00&#x2267;&#x2267;0.50&#x2003;&#x2003;(1)0&#x2266;()/&#x2266;0.25&#x2003;&#x2003;(2)

Toner, toner stored unit, image forming apparatus, and image forming method

A toner, wherein an amount of Al detected in the toner is 0.7% to 1.3%, where the amount of Al detected is determined based on quantitative analysis of Al by X-ray photoelectron spectroscopic analysis (XPS), and wherein [Tg2nd (THF insoluble matter)] is &#x2212;40&#xb0; C. to 30&#xb0; C., where the [Tg2nd (THF insoluble matter)] is a glass transition temperature measured in second heating of differential scanning calorimetry (DSC) of THF insoluble matter of the toner.

Toner, developer, and image forming apparatus

A toner, including: base particles containing a polyester resin, a colorant, and a release agent, wherein the toner has a glass transition temperature (Tg1st) of 20&#xb0; C. to 50&#xb0; C. where the glass transition temperature (Tg1st) is measured in first heating of differential scanning calorimetry (DSC) of the toner, wherein tetrahydrofuran (THF) insoluble matter of the toner has a glass transition temperature [Tg2nd (THF insoluble matter)] of 30&#xb0; C. or lower where the glass transition temperature [Tg2nd (THF insoluble to matter)] is measured in second heating of differential scanning calorimetry (DSC) of the THF insoluble matter, and wherein 50% or less of the colorant is present within a region of 1,000 nm from a surface of each of the base particles toward a center thereof.

Electrostatic image developing toner, developer, and image forming apparatus

A method of manufacturing a toner including forming a wax liquid dispersion in which a wax is dispersed in an organic solvent (A1), mixing an organic layer including the wax liquid dispersion, a binder resin and an organic solvent (A) to form an oil phase and dispersing and emulsifying the oil phase in an aqueous medium to obtain an emulsified liquid dispersion, wherein the aspect ratio average of the wax in the wax liquid dispersion is from 0.3 to 0.7 and the toner includes toner particles satisfying the following relationship (1) in an amount of 20% by number or smaller based on all toner particles: 0.5&#x3c;D2/D1, relationship (1), where D1 represents the major diameter (D1) of the toner and D2 represents the major diameter of the wax.

Method of manufacturing toner

A method of manufacturing a toner including dispersing a binder resin, a coloring agent and a releasing agent in an organic solvent to obtain an oil phase; dispersing the oil phase in an aqueous medium with a shearing force to obtain a dispersion emulsion; wherein the shearing force is made by a screen or vessel that is situated around a rotor, the screen spinning in a direction opposite to the direction that the rotor spins. Toner produced. Method of using the toner.

Method of manufacturing toner and toner

A method of manufacturing the toner comprising dispersing at least one of a binder resin or a precursor thereof, a coloring agent and a releasing agent in an organic solvent to obtain an oil phase, dispersing the oil phase in an aqueous medium with a shearing force to obtain a dispersion emulsion, wherein the dispersion emulsion process has plural stages and the shear speed A of the emulsification process of stage n is faster than the shear speed B of the emulsification process of stage n+1.

A method of manufacturing a toner including granulating mother toner particles in an aqueous medium to obtain a slurry containing the mother toner particles and adjusting a size distribution of the mother toner particles by screening coarse mother toner particles from the slurry with a screen to obtain the toner containing mother toner particulates.

A toner is provided including a binder resin and a wax having primarily C&#x2014;H and C&#x2014;C bonds, and having a melting point of 50 to 90&#xb0; C., wherein the wax is present in a surface portion of the toner in an amount of from 0.1 to 4.0% by weight, wherein the amount of the wax is determined by Fourier transform infrared spectroscopy attenuated total reflectance (FTIR-ATR); and the use of the toner in an image forming method, image forming apparatus, developer and toner cartridge containing the toner.

Toner, developer, image forming method, image forming apparatus, process cartridge, and toner container

Toner and a developer which are excellent in cleaning property and fixing property at low temperature, and capable of forming images with high quality are provided, along with a method for their production. A toner producing method involves dispersing and/or emulsifying an oil phase or a monomer phase containing a toner composition and/or a toner composition precursor in a water-based medium to granulate, wherein the toner has an average circularity of 0.925 to 0.970, and the toner composition and/or the toner composition precursor has a layered inorganic material in which at least a part of interlayer ions in the layered inorganic material has been exchanged with organic ions.

Toner, vessel with the toner, developer, image forming apparatus and process cartridge and image forming method

A toner satisfying at least one of the following relationships:10&#xb0; C.&#x3c;(1&#x2212;2)&#x3c;60&#xb0; C. and 0&#x3c;2/1&#x3c;

Toner and image forming method using the toner

Toner and a developer which are excellent in cleaning property and fixing property at low temperature, and capable of forming images with high quality are provided. A toner prepared by dispersing and/or emulsifying an oil phase or a monomer phase comprising a toner composition and/or a toner composition precursor in a water-based medium to granulate, wherein the toner has an average circularity of 0.925 to 0.970, and the toner composition and/or the toner composition precursor has a layered inorganic material in which at least a part of interlayer ions in the layered inorganic material has been exchanged with organic ions.

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Numazu, Japan

Akinori Saitoh